共查询到20条相似文献,搜索用时 125 毫秒
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本次会议由英国皇家化学会分析化学部电化学分析组和该部西北区分部联合主办 ,于 2 0 0 1年 4月 2 2日至 2 5日在英国Manchester市Solford大学召开 ,旨在为讨论电分析技术的最新进展及其应用提供一论坛、并作若干富有前景的展望。内容涉及应用现有方法论解决问题、改性表面的设计和应用、微型化系统、电化学分离和生物传感器等。特邀报告共 32个。现分析如下。 ( 1 )R .Comp ton ,电分析中的双重活化 ;声电分析、激光活化伏安法、热增强溶出伏安法 ;( 2 )D .Mandler,电分析化学中的自集形成单层 ;( 3)J.… 相似文献
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本文评述了原子力显微镜原理和技术及其在现场电化学和电分析化学领域中的应用,并展望了扫描隧道显微镜和原子力显微镜在电化学和电分析化学中的发展方向。 相似文献
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在石墨电极上脱氧核糖核酸与米托蒽醌嵌入作用的电化学研究 总被引:11,自引:0,他引:11
本文研究了单链DNA分子在石墨电上的固定方法,采用核酸分子杂交技术,使具有电化学活性的米托蒽酯嵌入DNA分子双螺旋结构的碱基对中,在电极上形成dsDNA-MS层,通过伏安法研究DNA分子和MX相互作用的电化学行为。 相似文献
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钴卟啉修饰电极为基底的葡萄糖酶电极 总被引:1,自引:1,他引:1
生物电化学传感器的开发和应用是目前电分析化学研究中的一个重要方向,其中最引人注目的是电流式生物电化学传感器的研究。传统的电流式生物电化学传感器的基础电极采用的是能检测氧气和过氧化氢的贵金属电极。本文采用四苯基钴卟啉化学修饰电极代替 相似文献
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双层类脂膜及其在电化学生物传感器中的应用 总被引:11,自引:0,他引:11
详细评述了各种双层类脂膜包括传统的双层类脂膜(BLM)、固体载体支撑的自组双层类脂膜(s-BLM)、固体载体支撑的混合双层类脂膜(e-BLM)的制备方法和特性,比较了其优缺点。介绍了双层类脂膜在电化学生物传感器中的应用,并展望了发展前景。 相似文献
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The past, present, and future of the application of self-assembled monolayers (SAMs) in electroanalytical chemistry is reviewed. SAMs for electroanalytical applications have been introduced in the early 1990s and since then have been exploited for the detection of different species ranging from metal ions to biomolecules and microorganisms. This review describes the different types of monolayers, surfaces on which they have been assembled, the various analytes, which were determined, and the various electrochemical techniques employed. The prospective and perspectives of this topic are discussed. 相似文献
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Su-Moon Park 《高等学校化学学报》1999,20(Z1):145
Work done on applications of modified electrodes to electroanalytical chemistry and digital instrumentation for electrochemical measurements in our laboratory in recent years will be presented. First, applications of modified electrodes with conducting polymer films and selfassembled monolayers (SAMs) of thiolated cyclodextrins will be demonstrated. 相似文献
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This paper describes novel electrochemical properties of gold nanoparticles/alkanedithiol conductive films and their electroanalytical applications for voltammetric determination of trace amount of one kind of environmental pollutants, catechol. The conductive films are prepared by closely packing 12-nm diameter gold nanoparticles (Au-NPs) onto Au electrodes modified with the self-assembled monolayers (SAMs) of alkanedithiols (i.e., HS(CH2)nSH, n = 3, 6, 9). The assembly of the Au-NPs onto the SAM-modified electrodes essentially restores the heterogeneous electron transfer between Au substrate and redox species in solution phase that is almost totally blocked by the SAMs and, as a result, the prepared Au-NP/SAM-modified electrodes possess a good electrode reactivity without a remarkable barrier toward the heterogeneous electron transfer. Moreover, the prepared Au-NP/SAM-modified electrodes are found to exhibit a largely reduced interfacial capacitance, compared with bare Au electrode. These electrochemical properties of the Au-NP/SAM-modified electrodes essentially make them very useful for electroanalytical applications, which is illustrated by voltammetric determination of trace amount detection of environmental pollutant, catechol. 相似文献
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Marco Frasconi Franco Mazzei Tommaso Ferri 《Analytical and bioanalytical chemistry》2010,398(4):1545-1564
Self-assembled monolayers (SAMs) provide a convenient, flexible and simple system to tailor the interfacial properties of
metals, metal oxides and semiconductors. Monomolecular films prepared by self-assembly are attractive for several exciting
applications because of the unique possibility of making the selection of different types of terminal functional groups and
as emerging tools for nanoscale observation of biological interactions. The tenability of SAMs as platforms for preparing
biosurfaces is reviewed and critically discussed. The different immobilization approaches used for anchoring proteins to SAMs
are considered as well as the nature of SAMs; particular emphasis is placed on the chemical specificity of protein attachment
in view of preserving protein native structure necessary for its functionality. Regarding this aspect, particular attention
is devoted to the relation between the immobilization process and the electrochemical response (i.e. electron transfer) of
redox proteins, a field where SAMs have attracted remarkable attention as model systems for the design of electronic devices.
Strategies for creating protein patterns on SAMs are also outlined, with an outlook on promising and challenging future directions
for protein biochip research and applications. 相似文献
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In this review, laser-induced graphene (LIG) -based electrodes are discussed by covering such essential areas, as a characterization of LIG material properties necessary for electroanalysis, including data on LIG sheet resistance, wettability, spatial resolution, electrochemical characteristics, as well as correlations of “process” - “properties” - “electroanalytical characteristics”of LIG-electrodes. Moreover, typical and innovative LIG-based electrodes designs for electroanalytical applications, including combined multi-analyte multimodal wearable sensors, interdigitated electrodes, are shown. The essential data related to LIG in electroanalysis are summarized in tables. The authors also discussed recent LIG-based electroanalytical applications. Close attention has been paid to LIG glucose sensors and biosensors. 相似文献
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Tang Y Yan J Zhou X Fu Y Mao B 《Langmuir : the ACS journal of surfaces and colloids》2008,24(23):13245-13249
Nonionic Fluorosurfactant Zonyl FSN self-assembly on Au(111) is investigated with scanning tunneling microscopy under ambient conditions. STM reveals that the FSN forms SAMs on Au(l11) with very large domain size and almost no defects. A (mean square root of 3 x mean square root of 3)R3 degree arrangement of the FSN SAM on Au(111) is observed. The SAMs show excellent chemical stability and last for at least a month in atmospheric conditions. The structure and stability of the FSN SAMs are compared with those of alkanethiols SAMs. It is expected that FSN may serve as a new kind of molecule to form SAMs for surface modification, which would benefit wider applications for various purposes. 相似文献
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Chemometric tools in electroanalytical chemistry: Methods for optimization based on factorial design and response surface methodology 总被引:1,自引:0,他引:1
César Ricardo Teixeira Tarley Gustavo Silveira Geraldo Domingues Matos Marcos Almeida Bezerra Sérgio Luis Costa Ferreira 《Microchemical Journal》2009,92(1):58-1606
The aim of this paper is to give a brief overview of chemometric techniques based on factorial designs and response surface methodologies used in the optimization of electroanalytical methods. Chemometric techniques have several important advantages over one-way optimization for analytical applications, including a relatively low cost, a reduced number of experiments, and possibilities to evaluate interactions among variables. These techniques also enable the selection of optimal experimental conditions, helping to avoid trivial mistakes during optimization. Despite these facts, chemometric techniques have rarely been applied to electroanalytical data, especially in comparison with their use in spectroscopy. The application of chemometric methods in electroanalytical chemistry has been mostly used for solving overlapping signals, multivariate calibration methods, model identification and optimization of analytical procedures. This review is focused on the latter applications and overviews the role of full or fractional factorial designs (first-order designs), as well as second-order designs, such as central composite, Doehlert and Box-Behnken designs, for optimization of electroanalytical methods. A discussion of chemometric-related advantages is also given for stripping analyses, flow injection systems with amperometric detection, differential pulse voltammetry, square wave voltammetry and electrochemical sensor preparation. 相似文献
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Meyerbröker N Zharnikov M 《Langmuir : the ACS journal of surfaces and colloids》2012,28(25):9583-9592
Here we describe the behavior of self-assembled monolayers (SAMs) of 4'-cyanobiphenyl-4-thiol (CBPT) on Au(111) upon electron irradiation. Under such a treatment, the aromatic framework of CBPT SAMs is laterally cross-linked while the nitrile groups, located at the SAM-ambience interface, are reduced to active amine moieties which can be used as docking sites for the coupling of other species. This makes CBPT monolayers as a promising system for conventional and chemical lithography as well as for nanofabrication. Along these lines, we demonstrate the preparation of complex polymer brushes, patterning of the underlying substrate, and fabrication of molecule-thin, free-standing membranes on the basis of CBPT SAMs. The balance between the application-favorable processes and defragmentation in these films is studied in detail, and comparison to the well-established (for the relevant applications) system of 4'-nitrobiphenyl-4-thiols is performed. Taking CBPT SAMs as a model system, the effect of the energy of the primary electrons on the extent of the chemical transformation and cross-linking in substituted aromatic SAMs is investigated. 相似文献